Your female Hamster is much too old to be a mum sadly, she will be infertile at that age anyway. Females must be bred for the first time between 4 - 6 months as after this their hip bones fuse leading to birth complications. Males can be bred from for as long as they are capable of the act

Babies have to be separated into single sex groups around 4 - 5 weeks, the females can stay with mum as long as she will tolerate them, but keep a close watch for squabbles which quickly turn nasty. They have to be housed singly from about 7 weeks old.

Hope that helps